Chemical Composition of Seaweeds

The table below gives the chemical composition of selected, representative
seaweeds, some of which are currently used for food or have been used as
food in the past. All figures, except for water (as percentage), are given
as grams per 100 grams of dry matter. When no data are available "nd"
is inserted.

In regard to the amount of protein, the convention is to convert the
total nitrogen to protein by multiplying by 6.25. This should be treated
with some caution as, for example, the amount of free nitrate will affect
the total nirtogen level. Free nitrates are found in varying amounts in
red and brown algae.

Constituents of common brown red and green algae

These figures were taken, with slight modification,
from Indergaard & Minsaas (1991). Further references are given below
the table.